Testing the accuracy of luminance maps acquired by smart phone cameras

Garcia-Hansen, Veronica Ruth, Cowley, Michael, Smith, Simon S., & Isoardi, Gillian (2013) Testing the accuracy of luminance maps acquired by smart phone cameras. In Proceedings of the CIE Centenary Conference "Towards a New Century of Light", Commission Internationale l'Eclairage, Paris, pp. 951-955.

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This paper looks at the accuracy of using the built-in camera of smart phones and free software as an economical way to quantify and analyse light exposure by producing luminance maps from High Dynamic Range (HDR) images. HDR images were captured with an Apple iPhone 4S to capture a wide variation of luminance within an indoor and outdoor scene. The HDR images were then processed using Photosphere software (Ward, 2010.) to produce luminance maps, where individual pixel values were compared with calibrated luminance meter readings. This comparison has shown an average luminance error of ~8% between the HDR image pixel values and luminance meter readings, when the range of luminances in the image is limited to approximately 1,500cd/m2.

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ID Code: 59525
Item Type: Conference Paper
Refereed: No
Keywords: High dinamic range images (HDR), Luminance mapping, smart phones, lighting
ISBN: 978-3-902842-44-2
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OPTICAL PHYSICS (020500)
Australian and New Zealand Standard Research Classification > BUILT ENVIRONMENT AND DESIGN (120000) > ARCHITECTURE (120100) > Architectural Science and Technology (incl. Acoustics Lighting Structure and Ecologically Sustainable Design) (120104)
Divisions: Current > Research Centres > Centre for Accident Research & Road Safety - Qld (CARRS-Q)
Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Schools > School of Design
Current > QUT Faculties and Divisions > Creative Industries Faculty
Current > QUT Faculties and Divisions > Faculty of Health
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Schools > School of Psychology & Counselling
Copyright Owner: Copyright 2013 please consult the authors
Deposited On: 01 May 2013 01:21
Last Modified: 24 Jan 2014 21:59

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